I found this thread interesting and it got me to thinking...as a new Texas member of the communitysurfbirds, I'm interested in migration from the south, as well as climate change effect. We have an urban heronry here in Dallas, smack dab in the center of the large medical center I work in with perhaps 2,000 nests (anhingas; white, black-crowned night-, little blue, and tricolored herons, cattle egrets) and I wonder if it thrives in part due to habitat destruction along the Texas coast??? It has been there about 50 years, reportedly. I am doing some informal research regarding urban heronries and am trying to determine longevity, reasons for heronry destruction vs. abandonment, etc.
Perhaps this is not consistent with this thread, but as there is so much birding expertise on this site and I am relatively new to birding, does anyone have any thoughts to share regarding climate change and east-west vs south-north migration patterns? Do those of you with years of experience have a sense of climate effect changes?
An article that may be of interest regarding California migration follows:
Re-Shuffling of Species with Climate Disruption: A No-Analog Future for California Birds?
(not sure how to post a hyperlink here)
I apologize for my non-linear train of thought.